Were I to try and state my theory briefly, then it would be somewhat as follows: Every thought necessitates a three-fold phenomenon--(1) the purely psychic activity; (2) the physiological correlate; and (3) the "dynamic correlate," which is as yet unrecognized by science. This "dynamic correlate" is the manifestation of the activity of the etheric double; which sets into motion certain vibratory activities which, though they are not physical vibrations, are their counterpart or _equivalent_ on the plane above matter--the "astral" plane, if the term be allowable; which is parallel to, but not identical with, the material plane. Thus by a sort of "doctrine of correspondences" we arrive at the conclusion that telepathic action is physical, in a sense, yet is not sufficiently physical to be measured by our instruments in the laboratory. The activity is, as it were, the _noumenon_, of which the physical vibration would be the phenomenon; but no phenomenal aspect of this activity may ever be manifested to us; and hence never be capable of being registered by science, as it exists today. I do not know whether or not I have made this theory very comprehensible, but it seems to me some such theory might explain the facts and at the same time do away with the difficulties. At all events no theory of telepathy which has been advanced to date can be said to be explanatory, when all the facts are taken into consideration; and if this first tentative groping serves to stimulate others to speculate, and above all to _experiment_, in this obscure field, I shall feel that a first onward step has been taken toward a correct understanding of the "Marvels of Telepathy." FOOTNOTES: [40] See Dr. G. B. Ermacora's paper in _Proceedings_, S.P.R., vol. xi. pp. 235-308. [41] Professor Henry Sidgwick, as we know, was Professor of Moral Philosophy in Cambridge, and his works on _Ethics_ and _Political Economy_ are considered standard in all countries. [42] This is the argument put forward by, e.g., Carl Snyder, in his _New Conceptions in Science_, pp. 306-7. [43] See my article in _The Monist_ (July-September 1913, pp. 445-58), "Earlier Theories of Gravity."--H. C. [44] Especially Dr. Ochorowicz, in his excellent work, _Mental Suggestion_, to which I am indebted for several of the ideas which follow. CHAPTER IX THE USES AND ABUSES OF MIND-CURE